IIASA RepositoryInternodons as equivalence classes in genealogical networks: Building-blocks for a rigorous species conceptD.J.KornetauthorJ.A.J.MetzauthorH.A.J.M.SchellinxauthorAmong the options suggested in phylogenetic systematics to solve the species problem is the Hennigian or internodal species concept. This concept interprets species as parts of the genealogical network of individual organisms between two successive permanent splits or between a permanent split and an extinction event. Though this option is at present not favoured by phylogeneticists, we believe that, to solve the species problem, there is no alternative to finding a satisfactory partition of the genealogical network. In previous work a formal definition has been developed of Hennigian or internodal species (called internodons here), based on a logical relation between individual organisms. In this paper, we prove that this definition indeed partitions genealogical networks exhaustively into mutually exclusive entities, by showing that the defining relation is an equivalence relation. Although internodons should not themselves be seen as species, they are essential building-blocks for any satisfying species concept.1995-01SpringerArticle

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant IIASA Repository the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that IIASA Repository does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at IIASA Repository) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.